Download - Materials and Constraints. The 5 Exterior Forces Tension Compression Torsion Shearing Bending
Materials and Constraints
The 5 Exterior Forces
Tension Compression Torsion Shearing Bending
Constraints
effects caused inside a material by an external force which tends to deform it
Application of the force application of the force of tension the effects of an identical force of compression will not be the same if the
thickness is different
Types of ConstraintsConstraint Definition ExamplesTension Tensile stress is
formed in a material which undergoes a force tending to lengthen it
Compression Compressive stress is formed in a material which undergoes a force tending to compress it
Torsion Torsional stress is formed in a material which undergoes a force tending to twist it
DeformationsElastic temporary change in
dimensions of a part when it put there under constraint. The object regains its shape as soon as the force is released
Plastic permanent deformation which occurs at the time of a setting under constraint and which remains when the force causing the deformation is removed
Mechanical Properties of Materials characteristic specific to a material. It
can determine the way in which the material will act or react under one or more mechanic pressures
Principle Mechanical Properties of Materials Property Definition
Hardness capacity to resist the deformation during the penetration of a hard body
Rigidity capacity to resist traction (tension)
Impact Strength capacity to resist shocks
Malleability capable of being flattened into thin sheets without tearing, under the effect of a compressive force such as hammering or rolling
Principle Mechanical Properties of Materials Property Definition
Brittleness fact of breaking without becoming deformed under the effect of a force
has little tendency to deform (or strain) before fracture
Ductility capacity to be able to be stretched into wire without breaking under the effect of a force of traction
Elasticity capacity of an object to regain its initial shape when the force which acts on it ceases
Principle Mechanical Properties of Materials Property Definition
Thermal Conductibility
capacity to transmit heat
Thermal Dilation Coefficient
property characterizing the relative increase in the volume of a body according to the increase in the temperature
Corrosion Resistance
capacity to resist the action of smoke, salts and chemicals which cause corrosion (rust)